Bug 1671343 (CVE-2017-18360)

Summary:	CVE-2017-18360 kernel: Division by zero in change_port_settings in drivers/usb/serial/io_ti.c resulting in a denial of service
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, airlied, bhu, brdeoliv, bskeggs, dhoward, dmoppert, dvlasenk, fhrbata, hdegoede, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, nmurray, plougher, rt-maint, rvrbovsk, steved, vdronov, williams, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A division-by-zero in set_termios(), when debugging is enabled, was found in the Linux kernel. When the [io_ti] driver is loaded, a local unprivileged attacker can request incorrect high transfer speed in the change_port_settings() in the drivers/usb/serial/io_ti.c so that the divisor value becomes zero and causes a system crash resulting in a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-20 21:18:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1540721, 1553351, 1671752, 1671753, 1671755
Bug Blocks:	1671344

Description Andrej Nemec 2019-01-31 13:05:27 UTC

A division-by-zero in set_termios() when debugging is enabled was found in the Linux kernel. When [io_ti] driver is loaded a local unprivileged attacker can request incorrect high transfer speed in the change_port_settings() in the drivers/usb/serial/io_ti.c so that the divisor value becomes zero and causes a system crash and a denial-of-service.

References:

https://marc.info/?l=linux-usb&m=149449572020916&w=2

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6aeb75e6adfaed16e58780309613a578fe1ee90b

Comment 10 Product Security DevOps Team 2020-05-20 21:18:57 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2017-18360